如何加载自己的公司徽标?

A logo is simply a picture (bitmap). As such it should be treated no differently than any other bitmap.

Create your image and size it using PC tools such as paint or GIMP. Use the image conversion utility to convert to a format that is suitable (higher resolution = more memory) and load the image. See the examples page for code examples e.g. Example 6 – Image Viewer.